>>The OPEN processing documentation describes DFSMS as merging the data >>from the DSCBs into the JFCB. How is that information available to an >>application program?
>RDJFCB, with a JFCB entry in the DCB exit list. Or use an ARL Yes, yes, I know how to read a JFCB. The intended question is "how is THAT INFORMATION [the MERGED INFORMATION, in other words] available ..." Specifically, if you do a RDJFCB after you open the dataset, will you get the merged information? Alternative, if you do an OPEN TYPE=J, will the information be merged into your in-storage JFCB? Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf Of Shmuel Metz (Seymour J.) Sent: Wednesday, November 16, 2005 3:51 PM To: [email protected] Subject: Re: Determining size information for existing QSAM dataset In <[EMAIL PROTECTED]>, on 11/16/2005 at 10:23 AM, Charles Mills <[EMAIL PROTECTED]> said: >- Using OBTAIN/CAMLST to read the DSCBs. This gives both SPACE= >information and actual extent sizes. Any comments? Don't forget to look at DS1LSTAR. >- I assume that RDJFCB for a not-yet-opened dataset will give SPACE= >information only as coded in the DD statement (or SVC 99) which >would be atypical and/or misleading for input datasets. Expect zero for input. It's only useful for new data sets. >The OPEN processing documentation describes DFSMS as merging the data >from the DSCBs into the JFCB. How is that information available to an >application program? RDJFCB, with a JFCB entry in the DCB exit list. Or use an ARL. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
